# fdisk /dev/sdk
# /etc/init.d/oracleasm createdisk VOL8 /dev/sdk1
$ export ORACLE_HOME=/d01/oracle/app/product/11.2.0/grid
$ export ORACLE_SID=+ASM
$ sqlplus / as sysasm
SQL> ALTER DISKGROUP DATA ADD QUORUM FAILGROUP DATA_0004 DISK '/dev/oracleasm/disks/VOL8' NAME DATA_0004 SIZE 8189 M;